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Finding the Fourth Proportional to 958.16, 1,321.80 and 626.46

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Solution

The fourth proportional to 958.16, 1,321.80 and 626.46 is: 864.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.16 : 1,321.80 = 626.46 : x
  2. Step 2: Convert to fraction form
    958.16/1,321.80 = 626.46/x
  3. Step 3: Cross multiply
    958.16x = 1,321.80 × 626.46
  4. Step 4: Simplify right side
    958.16x = 828,054.83
  5. Step 5: Solve for x
    x = 828,054.83/958.16
  6. Step 6: Final answer
    x = 864.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.